Neptunian Rings Fact Sheet

[Neptune's rings]
Rings of Neptune
  Radius
(km)		 Radius/
Eq. radius		 Optical
Depth		 Albedo
(x 10-3)		 Width
(km)
Neptune equator 24,766 1.000  
Galle (1989N3R) ~41,900 1.692 ~0.0001 ~15 ~2000
LeVerrier (1989N2R) ~53,200 2.148 ~0.01 ~15 < 100
Lassell (1989N4R*) ~53,200 2.148 ~0.0001 ~15 ~4000
Arago (1989N4R*) ~57,200 2.310 < 100  
Unnamed (indistinct) 61,953 2.501  
Adams (1989N1R) 62,933 2.541 0.01 - 0.1 ~15 ~15
  Arcs in Adams Ring:  
     Courage 62,933 2.541 0.12   ~15
     Liberté 62,933 2.541 0.12   ~15
     Egalité 1 62,933 2.541 0.12 ~40 ~15
     Egalité 2 62,933 2.541 0.12 ~40 ~15
     Fraternité 62,933 2.541 0.12   ~15

(*Lassell and Arago were originally identified as one ring, designated 1989N4R) For more details on the rings of Neptune, see the PDS Rings Node Vital Statistics.

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NASA
Author/Curator:
Dr. David R. Williams, dave.williams@nasa.gov
NSSDCA, Mail Code 690.1
NASA Goddard Space Flight Center
Greenbelt, MD 20771
+1-301-286-1258

NASA Official: Thomas Morgan, thomas.h.morgan@nasa.gov
V1.0, 17 July 1995
Last Updated: 14 October 2015, DRW